Current Calculator
Enter the values of voltage, V(V) and resistance, R(Ω) to determine the values of Current, I(A).
Current Formula:
Current is the flow of electric charge in a conductor, typically measured in amperes (A). It is driven by a difference in electric potential, or voltage, across the conductor.
The magnitude of the current is directly proportional to the voltage and inversely proportional to the resistance within the circuit.
Ohms law describes the relationship between voltage, current and resistance.
Voltage is the electric potential difference between two points. It can be thought of as the “pressure” that pushes electric charges through a conductor.
Current is the rate at which electric charge flows past a point in a circuit. It is analogous to the flow rate of water in a pipe.
Resistance is a measure of how much a component or material resists the flow of electric current. Higher resistance means less current for a given voltage.
Current, I(A) in amperes is calculated by dividing the voltage, V(V) in volts and resistance, R(Ω) in ohms.
Current, I(A) = V(V) / R(Ω)
I(A) = current in amperes, A.
V(V) = voltage in volts, V.
R(Ω) = resistance in ohms, Ω.
Current Calculation:
- Suppose a circuit has a voltage of 12 volts and a resistance of 4 ohms.
Given: V(V) = 12V, R(Ω) = 4 Ω.
Current, I(A) = V(V) / R(Ω)
I(A) = 12 / 4
I(A) = 3A.
- If a resistor with a resistance of 10 Ω has a current of 2A flowing through it, the voltage across the resistor is:
Given: I(A) = 2A, R(Ω) = 10Ω.
Current, I(A) = V(V) / R(Ω)
V(V) = I(A) * R(Ω)
V(V) = 2 * 10
V(V) = 20V.